Anthropic Launches Claude Opus 5.5 with 40% Cost Reduction
Anthropic released Claude Opus 5.5 on September 22, matching the performance of its top-tier Fable 5.1 model while cutting operating costs by 40% compared to the previous Opus 5. The new model is available on AWS, Microsoft Azure, and Google Cloud.
New Efficient AI Model Released
Anthropic released Claude Opus 5.5 on September 22, 2026. The new AI model delivers performance comparable to its top-tier Fable 5.1 while costing 40% less to run than its predecessor.
Performance and Pricing
Claude Opus 5.5 costs $4 per million input tokens and $20 per million output tokens, versus $5 and $25 for the previous Opus 5. Anthropic says the new model can handle long-running coding and knowledge-work tasks, ships with a 1-million-token context window, and includes always-on adaptive reasoning. Claude Opus 5.5 is now available on platforms such as Amazon Web Services (AWS), Microsoft Azure, and Google Cloud.
Broader Market Context
The timing matters because frontier-model economics are becoming almost as important as raw intelligence. OpenAI, Anthropic, Google, and Chinese AI developers are being pushed to deliver more capability per dollar as enterprises move. The release lands amid growing debate over AI risks. CEO Dario Amodei earlier this month called on the global AI community to slow down the pace of releasing new capabilities to address safety concerns.
Safety and Deployment
Claude Opus 5.5 is Anthropic's first release since the company called for pacing the frontier. It was tested before release by external evaluators, including Frontier Design and METR. According to Anthropic, Claude Opus 5.5 is the inaugural model in the Claude 5.5 family and is the company's first launch following its recent call for caution in advancing high-powered AI technologies.